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Mathematics
Problem
For the proper rational function
P
(
x
)
(
x
−
1
)
(
x
+
2
)
2
(
x
2
+
4
)
\displaystyle \frac{P(x)}{(x-1)(x+2)^{2}(x^{2}+4)}
(
x
−
1
)
(
x
+
2
)
2
(
x
2
+
4
)
P
(
x
)
, how many distinct constants will appear in its partial-fraction decomposition? a) 6 b) 5 c) 7 d) 4
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